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ECE 313ECE 313

Microelectronic CircuitsMicroelectronic Circuits– 4th edition4th edition

Sedra & SmithSedra & Smith

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Chapter 1Chapter 1Introduction to ElectronicsIntroduction to Electronics

SignalsSignals Frequency Spectrum of SignalsFrequency Spectrum of Signals

– Fourier series/transformFourier series/transform Analog and Digital SignalsAnalog and Digital Signals

– continuous vs. discrete amplitudescontinuous vs. discrete amplitudes

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AmplifiersAmplifiers

– Signal amplification : linear, nonlinear Signal amplification : linear, nonlinear preamplifierspreamplifiers

– Amplifier Circuit SymbolAmplifier Circuit Symbol– Voltage GainVoltage Gain– Power Gain, Current GainPower Gain, Current Gain– dBdB– Power suppliesPower supplies

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Amplifier SaturationAmplifier Saturation

linear - linear - except for except for output output saturationsaturation

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Nonlinear TransferNonlinear Transfer

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Biasing - for linear operationBiasing - for linear operation

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Circuit Models for AmplifiersCircuit Models for Amplifiers

Voltage amplifiersVoltage amplifiers Current amplifiersCurrent amplifiers Transconductance amplifiersTransconductance amplifiers Transresistance amplifiersTransresistance amplifiers

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BJTBJT

EmitterEmitter

BaseBase

CollectorCollector

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Frequency Response of Frequency Response of AmplifiersAmplifiers

Transfer functionTransfer function Amplifier bandwidthAmplifier bandwidth Evaluating frequency responseEvaluating frequency response Single-time-constant (STC) networksSingle-time-constant (STC) networks

– low pass (LP)low pass (LP)– high pass (HP)high pass (HP)

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STC - low passSTC - low pass

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STC - high passSTC - high pass

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Amplifier Classification based Amplifier Classification based on FREQUENCY RESPONSEon FREQUENCY RESPONSE

ac amplifierac amplifier dc amplifier (low pass amplifier); ICdc amplifier (low pass amplifier); IC bandpass amplifierbandpass amplifier

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DIGITAL LOGIC INVERTERDIGITAL LOGIC INVERTER

VTCVTC Noise MarginsNoise Margins

– low input ; high inputlow input ; high input The ideal VTCThe ideal VTC Inverter ImplementationInverter Implementation Power dissipation in VLSIPower dissipation in VLSI Propagation delayPropagation delay